header {
    width:100%;
    height:80px;
    background-color:rgb(160, 145, 145);
    position: relative;
}
header h1 {
    text-align: center;
    line-height: 80px;
    font-size: 22px;
}
header a {
    color:greenyellow;
    position:absolute;
    right: 20px;
    top:20px;
    border: 1px solid burlywood;
    padding: 10px;
}
.main {
    width:1000px;
    margin:30px auto;
}
.head {
    width:100%;
    height:50px;
    background-color: rgb(160, 145, 145); 
    margin-bottom: 20px;
    box-sizing: border-box;
    padding:15px 0 0 10px;
    font-size: 16px;
}
.head span:nth-of-type(1) {
    padding-left:200px;
    
}
.head span:nth-of-type(2) {
    padding-left:320px;
}
.head span:nth-of-type(3) {
    padding-left:100px;
}
.head span:nth-of-type(4) {
    padding-left:100px;
}
.list li{
    width:100%;
    border:1px solid #666;
    overflow: hidden;
    padding:10px;
}
.list input[type="checkbox"]{
    float: left;
    margin-top:30px;
}
.list .empty {
    text-align: center;
    line-height: 30px;
}
.list li img {
    float: left;
    margin-left: 30px;
    width:80px;
    height:80px;
}
.list li .title {

    padding-left: 10px;
}
.list li .price {
    padding-left: 90px;
    padding-right: 30px;
}
.num {
    display: inline-block;
    width:150px; 
    padding-left: 30px;
}
.num input[type="text"] {
    width:30px;
    margin-left: 5px;
    text-align: center;
}
.list li .del {
    float: right;
    padding-right:50px;
}